Another vote here for the RST, great bike.
My experiences are the same as Geocycle's. I have an RST and a Raven Tour, the RST weighs about 14.5 kgs with a Thorn Expedition Rack and Hub Dynamo lighting, the Tour is about 1.5 kgs heavier.
It feels quicker than it actually is due to the fairly tight geometry, I have Rigida Grizzly CSS rims on mine which are heavy and I plan to get lighter rims when funds allow, I'm sure it would make a big difference.
Good luck and hope you get your bike very soon,
Neil